阅读说明：本技术 一种高速公路中央分隔带内桥墩防撞墙 (Anti-collision wall with bridge piers in central separation belt of expressway ) 是由 黄少雄 刘小飞 黄森华 何海 吴海平 林壮宏 刘明 刘旷达 朱凯 喻志然 于 2021-07-14 设计创作，主要内容包括：本发明公开了一种高速公路中央分隔带内桥墩防撞墙,包括加高防护段和过渡段,所述加高防护段将至少一个桥墩包裹在中间,并与所述桥墩之间留有空隙,所述加高防护段与高速公路中央护栏之间设置所述的过渡段,所述过渡段为高度过渡结构,从所述加高防护段的高度逐渐过渡至所述护栏的高度,所述加高防护段和所述过渡段的迎撞面为坡面角度相同的坡面结构,且所述加高防护段为加强型坡面段。本发明可耗散车辆对桥墩的撞击力,减少车辆撞击桥墩产生的侧倾,提高对高速公路中央分隔带布设桥墩的防护等级。(The invention discloses a collision-proof wall of a pier in a central separation zone of a highway, which comprises a heightening protection section and a transition section, wherein at least one pier is wrapped in the middle of the heightening protection section, a gap is reserved between the heightening protection section and the pier, the transition section is arranged between the heightening protection section and a guardrail in the center of the highway, the transition section is of a height transition structure and gradually transits from the height of the heightening protection section to the height of the guardrail, the collision-facing surfaces of the heightening protection section and the transition section are of slope structures with the same slope angle, and the heightening protection section is a reinforced slope section. The invention can dissipate the impact force of the vehicle to the bridge pier, reduce the side inclination generated by the vehicle impacting the bridge pier and improve the protection grade of the bridge pier arranged on the central separation belt of the expressway.)

1. The utility model provides a highway central authorities separate in-band pier anticollision wall, is including heightening protection section and changeover portion, its characterized in that, heighten the protection section with at least one pier parcel in the centre, and with leave the space between the pier, heighten and set up between protection section and the highway central authorities guardrail the changeover portion, the changeover portion is high transition structure, follows heighten the high gradual transition of protection section extremely the height of guardrail, heighten the protection section with the face of colliding with of changeover portion is the same domatic structure of domatic angle, just heighten the protection section for the domatic section of strenghthened type.

2. The anti-collision wall with piers in the central separation belt of the expressway of claim 1, wherein: heightening the protection section, wherein the heightening protection section is a core filling concrete structure of steel plate wrapped concrete, reinforcing ribs are arranged on the inner side face of the steel plate of the heightening protection section, and the steel plate of the heightening protection section is preset and used for connecting the connecting ribs with the transition section.

3. The anti-collision wall with piers in the central separation belt of the expressway of claim 1, wherein: and a buffer material is filled in a gap between the heightened protection section and the pier.

4. The anti-collision wall with bridge piers in the central separation belt of the expressway of claim 2 or 3, wherein: the height of the heightened protection section from the road surface is more than or equal to 1.6 m, and a blocking ridge is arranged at the top of the slope of the heightened protection section.

5. The anti-collision wall with piers in the central separation belt of the expressway of claim 4, wherein: the heightening protection section is an integral or separated wall body.

6. The anti-collision wall with piers in the central separation belt of the expressway of claim 5, wherein: the transition section is of a concrete structure and comprises a high surface section, an inclined surface section and a low surface section, the height of the high surface section is the same as that of the heightened protection section, and the height of the low surface section is the same as that of the guardrail.

7. The anti-collision wall with piers in the central separation belt of the expressway of claim 6, wherein: and blocking ridges are arranged at the top of the slope surface of the high-surface section, the inclined-surface section and the low-surface section of the transition section facing the collision surface.

8. The anti-collision wall with piers in the central separation belt of the expressway of claim 7, wherein: and a vegetation foundation pit is arranged in the transition section, and the bottom of the vegetation foundation pit is communicated with a drain pipe.

9. The anti-collision wall with piers in the central separation belt of the expressway of claim 8, wherein: the transition section is of an integral or separated concrete structure.

10. The anti-collision wall with piers in the central separation belt of the expressway of claim 1, wherein: the guardrail is a corrugated beam guardrail or a new jersey guardrail.

Technical Field

The invention belongs to the technical field of civil engineering, and particularly relates to an anti-collision wall with piers in a central separation belt of a highway.

Background

With the vigorous development of bridge construction in China, the condition of mutual crossing of expressways tends to be common, for a bridge which spans the expressways upwards, if a bridge pier is not arranged in a center separation zone of the strided expressways, a bridge structure with a larger span is required, the height of the corresponding bridge span is increased more, the longitudinal section of a main bridge is required to be raised, the length of a lead bridge wire is increased, the economy of the bridge structure is poor, meanwhile, the construction difficulty of a large-span bridge is large, and the construction period is long.

Therefore, when the highways cross each other, the piers are usually arranged in the central separation zone of the existing highways, the span of the bridge structure can be reduced to a greater extent, and the beam height of the bridge structure is controlled within a reasonable range. The bridge piers are arranged in the central separation belt of the expressway, and the anti-collision design of the bridge piers needs to be considered correspondingly, so that the bridge piers crossing the bridge structure can play an effective anti-collision effect even when the vehicles collide when the vehicles run at high speed. Therefore, the anti-collision design of arranging piers in the central separation belt is very important. However, the width of the central separation strip on the highway is limited, the available space of the bridge pier and the anti-collision wall is limited, the bearing capacity of the bridge pier needs to be met, and the science and the effectiveness of the anti-collision wall need to be guaranteed, so that great challenges are brought to the construction design.

The Chinese patent publication No. CN209384099U discloses a highway median strip pier anti-collision guardrail structure, which comprises an encapsulation heightening straight wall section, a transition structure and a transition connection, wherein the encapsulation heightening straight wall section is of a concrete structure or a steel structure, a plurality of piers are wrapped in the middle of the encapsulation heightening straight wall section, a gap is reserved between the pier and the encapsulation heightening straight wall section, the transition structure is of a concrete structure and comprises an angle transition section and a height transition section, the transition structure is gradually heightened and transited from the height of the median strip guardrail to the same height with the encapsulation heightening straight wall section, and the angle of the collision-facing surface slope of the transition structure is gradually transited to a straight surface form. Specifically, the collision-facing surfaces on two sides of the encapsulated heightened straight wall section are straight surfaces, and the collision-facing surfaces of the transition structure are transition forms of a reinforced slope surface, an F-shaped slope surface and a single slope surface. The crash barrier structure in this patent has the following problems in application:

1. the side shapes among the median strip guardrail, the transition structure and the heightened straight wall section, namely the collision-facing surface, have transitional change, the vehicle runs on the expressway, the visual angle of the running has obvious change, and the jumping property of the inclination of the collision-facing surface has certain influence on the comfort of the running.

2. The face of colliding with of pier anticollision barrier structure is the straight-faced formula, is subject to the width condition of highway central authorities' median, and the inboard width size that sets up the anticollision barrier structure is limited, and straight-faced formula anticollision barrier structure is when taking place the vehicle striking, and the energy dissipation effect when the difficult collision that plays.

Disclosure of Invention

The invention aims to provide a collision-prevention wall for piers in a central separation belt of an expressway, which can dissipate the impact force of vehicles to the piers, reduce the side inclination generated when the vehicles impact the piers and improve the protection grade of arranging the piers in the central separation belt of the expressway.

The technical scheme of the invention is as follows:

the utility model provides a highway central authorities separate in-band pier anticollision wall, is including increasing protection section and changeover portion, increase protection section with at least one pier parcel in the centre, and with leave the space between the pier, increase and set up between protection section and the highway central authorities guardrail the changeover portion, the changeover portion is high transitional structure, follows the high gradual transition of increasing protection section extremely the height of guardrail, increase protection section with the face of meeting and colliding of changeover portion is the same domatic structure of domatic angle, just it is the domatic section of strenghthened type to increase the protection section.

The heightened protection section and the transition section can be of an integral cast-in-place structure, and are connected to the anti-collision wall foundation after casting and are connected with the guard bar of the central separation belt into a whole. Wherein, the anti-collision wall foundation is embedded and fixed below the road surface. The changeover portion, the face of colliding with of heightening the protection section are domatic the same for the angle, because the domatic angle of guardrail and crashproof wall is the same, go on highway, can not produce the jumping nature in the field of vision because of the change of the face angle of colliding with of meeting, improve driving safety travelling comfort, the key lies in, when the unexpected condition of taking place the vehicle striking pier in to crashproof wall, the domatic vehicle that will guide of crashproof wall climbs, the energy of dissipation striking reduces the pier and heels, reduces the hidden danger of bridge.

The invention also has the following preferred design:

because the width of the central separation belt is limited, the heightened protection section of the invention adopts a reinforced slope surface. As a possible implementation: heightening the protection section, wherein the heightening protection section is a core-filling concrete structure of steel plate wrapped concrete, reinforcing ribs are arranged on the inner side face of the steel plate of the heightening protection section, the connecting strength of the steel plate and the concrete is enhanced, and the steel plate of the heightening protection section is preset and used for connecting the connecting ribs with the transition section.

The gap between the heightening protection section and the pier is filled with a buffer material, and the buffer material can be a PVC plate with the thickness of 1CM and is used for interface segmentation of the steel plate of the heightening protection section and the pier.

The invention is applied to the expressway, and considers that vehicles running on the road at the inner side of the expressway are generally small cars, the height of the heightened protection section from the road surface is more than or equal to 1.6 m, and the top of the slope of the heightened protection section is provided with the blocking ridge to inhibit the vehicles from climbing too high along the slope to cause new danger.

The heightened protection section is an integral or separated wall body, the integral wall body can be cast in situ, the separated wall body can be spliced in situ, and the structure prefabrication is facilitated.

The transition section is of a concrete structure and comprises a high-surface section, an inclined-surface section and a low-surface section, wherein the height of the high-surface section is the same as that of the heightened protection section, and the height of the low-surface section is the same as that of the guardrail.

And blocking ridges are arranged at the top of the slope surface of the high-surface section, the inclined-surface section and the low-surface section of the transition section facing the collision surface.

A vegetation foundation pit is arranged in the transition section, green plants and the like can be planted in the vegetation foundation pit, and the bottom of the vegetation foundation pit is communicated with a water drain pipe.

The transition section is of an integral or separated concrete structure, the integral wall body can be cast in situ, the separated wall body can be spliced in situ, and the structure prefabrication is facilitated.

The guardrail is a corrugated beam guardrail or a new Jersey guardrail and is connected with the transition section in a connection mode meeting the standard requirement to form a continuous protection system with rigid transition.

The invention has the following beneficial effects:

1. the reinforced steel plate structure of the core-filled concrete is adopted by the anti-collision wall, namely the heightened protection section, in the bridge pier range of the central separation zone of the expressway, the steel plate structure has the characteristics of high strength and small deformation, and the anti-collision requirement can be realized by relatively small thickness. The collision-facing surfaces of the heightened protection section and the transition section are both slope surfaces and have consistent slope surface angles, so that the visual angle of the travelling crane is uniform and smooth, the visual field jump caused by the change of the collision-facing surface form is avoided, and the safety and the comfort of the travelling crane are improved.

2. The steel plate structure of the core filling concrete can correspond to the reinforced slope type according to the grade of the guardrail, the reinforced slope is maintained, the energy dissipation in the climbing process when a vehicle is impacted can be reduced to a greater extent, and the effect that an anti-collision structure arranged by a straight wall directly bears impact load is avoided. Simultaneously all set up one at the anticollision wall top and blockked the bank, had certain effect to restraining that large-scale car is in the same direction as concrete guardrail and climbed.

3. The anti-collision wall is mutually connected with the corrugated beam guardrail and the new Jersey guardrail on the normal road section in a mode of meeting the standard requirement to form a continuous protection system with rigid transition, so that the anti-collision wall has good functions of energy dissipation, buffering, guiding, climbing prevention and the like while preventing a vehicle from colliding with a pier, and the life safety of personnel is ensured.

Drawings

FIG. 1 is a top view of an anti-collision wall with piers in a central separation zone of an expressway of the present invention;

FIG. 2 is a view A-A of FIG. 1;

FIG. 3 is a cross-sectional view B-B of FIG. 1;

FIG. 4 is a cross-sectional view C-C of FIG. 1;

FIG. 5 is a cross-sectional view D-D of FIG. 1;

FIG. 6 is a skeletal view of a reinforcement bar for the transition section of the present invention;

FIG. 7 is a cross-sectional view E-E of FIG. 6;

fig. 8 is a sectional view F-F of fig. 6.

Description of reference numerals: 1-pier, 2-heightening protective section, 21-steel plate, 22-reinforcing rib, 3-transition section and 31-high surface section; 32-inclined plane section, 33-low surface section, 34-inclined plane section wall, 35-vegetation foundation pit, 36-water drain pipe and 37-low surface section wall; 4-a guardrail, 5-a bearing platform, 6-a gap, 7-an anti-collision wall foundation, 71-a first anti-collision wall foundation and 72-a second anti-collision wall foundation; 8-cushioning material, 9-road.

Detailed Description

The technical solutions of the present invention are described in detail below with reference to the accompanying drawings and examples, so that those skilled in the art can better understand and implement the technical solutions of the present invention.

The utility model provides a highway central authorities separate interior pier crashproof wall of area, see figure 1 and 2, including heightening protection section 2 and changeover portion 3, heighten protection section 2 and wrap up a pier 1 in the centre, and leave space 6 between 1 with the pier, it sets up changeover portion 3 to heighten between protection section 2 and the highway central authorities guardrail 4, changeover portion 3 is high transition structure, from heightening the height of protection section 2 and gradually transitioning to the height of guardrail 4, as shown in figure 3 to 5, heighten the slope structure that the face of colliding that protection section 2 and changeover portion 3 are the same for domatic angle, and heighten protection section 2 and be the domatic section of strenghthened type.

In practical application, according to the construction condition, the heightening protection section 2 can wrap a plurality of piers 1.

As a preferred embodiment:

the pier 1 is positioned on a bearing platform 5, the heightening protection section 2 and the transition section 3 are of an integral cast-in-place structure, and are connected to an anti-collision wall foundation 7 after casting and are connected with a guardrail 4 of a central separation belt into a whole. Because the inside of the heightening protection section 2 is the pier 1, the structural arrangement of the first anti-collision wall foundation 71 below the heightening protection section is different from that of the second anti-collision wall foundation 72 below the transition section 3. Wherein, the anti-collision wall foundation 7 is embedded below the road surface of the highway 9.

Because the width of the central separation belt is limited, the heightened protection section 2 adopts a reinforced slope surface. In this embodiment, as shown in fig. 3, the heightening protection section 2 is a core-filling concrete structure in which a 2CM steel plate wraps concrete, reinforcing ribs 22 are provided on an inner side surface of a steel plate 21 of the heightening protection section 2, the connection strength between the steel plate 21 and the concrete is enhanced, and the steel plate 21 of the heightening protection section 2 is provided with a connection rib for connecting with the transition section 3 in advance.

And a gap 6 between the heightening protection section 2 and the pier 1 is filled with a buffer material 8, and the buffer material 8 can be a PVC (polyvinyl chloride) plate with the thickness of 1CM (centimeter) and is used for interface segmentation of the steel plate of the heightening protection section 2 and the pier 1.

Considering that vehicles running on the inner side of the highway are generally small cars, the height of the heightening protection section 2 from the road surface is more than or equal to 1.6 m, and the top of the slope surface of the heightening protection section 2 is provided with a blocking ridge, so that the condition that the vehicle climbs along the slope surface too high can be inhibited, and new danger is caused.

The heightened protection section 2 is an integral or separated wall body, the integral wall body can be cast in situ, the separated wall body can be spliced in situ, and the structure prefabrication is facilitated.

The transition section 3 is of a concrete structure, the steel reinforcement framework structure of the transition section is as shown in fig. 6 to 8, and comprises a high surface section 31, an inclined surface section 32 and a low surface section 33, the height of the high surface section 31 is the same as that of the heightening protection section 2, the height of the low surface section 33 is the same as that of the guardrail 4, and connecting ribs connected with the first anti-collision wall foundation 71 are arranged below the high surface section 31, the inclined surface section 32 and the low surface section 33. The top of the slope surface of the high surface section 31, the inclined surface section 32 and the low surface section 33 of the transition section 3 facing the collision surface is also provided with a stop ridge.

As shown in fig. 1, a vegetation foundation pit is arranged in the transition section 3, specifically, as shown in fig. 4, the inclined plane section 32 of the transition section 3 is provided, the inside of the inclined plane section wall 34 is hollow, green plants and the like can be planted in the vegetation foundation pit 35, and the bottom of the vegetation foundation pit 35 is communicated with a drain pipe 36. As shown in FIG. 5, which is a cross section of the low surface section 33 of the transition section 3, the wall 37 of the low surface section is hollow, and because the low surface section 33 is used for connecting the guard rail 4, concrete stiffeners can be added in the hollow structure to strengthen the structure.

The transition section 3 is of an integral or separated concrete structure, the integral wall body can be cast in place, the separated wall body can be spliced in place, and the structure prefabrication is facilitated.

The guardrail 4 can be a corrugated beam guardrail or a new Jersey guardrail and is connected with the transition section in a connection mode meeting the specification requirement to form a continuous protection system with rigid transition.

The above-mentioned embodiments are merely preferred embodiments of the present invention, but should not be construed as limiting the invention, and any variations and modifications based on the concept of the present invention should fall within the scope of the present invention, which is defined by the claims.